Doom was the classic 3D shoot'em'up game from id
Software. PrBoom is a game engine for playing Doom
levels, which runs on both Windows and Linux/Unix
systems. It uses the SDL graphics library. PrBoom
a very faithful Doom port, with great effort taken
to be compatible with as many original Doom levels
and demos as possible.

wad2svg takes a level file for the computer game
Doom, and draws a 2D map of the level as an SVG
(Scalable Vector Graphic) file. This can then be
edited and/or converted to a raster image using a
suitable vector graphics programs. wad2svg can
also draw the node tree of a Doom level, and is
designed to be extended to draw other aspects of
the level.

zsync is a implementation of rsync over HTTP. It
allows updating of files from a remote Web server
without requiring a full download or a special
remote server application. It uses a metafile,
which is created on the server, to determine which
parts of a file the user already has; it then
downloads the remaining parts via HTTP. No special
server or Web server module is needed. It also
works with gzip files, and content on the server
can be compressed to further reduce download
times.

Kye is a puzzle game which takes ideas from Sokoban and the genre of falling-rocks puzzle games. However, it includes a wider range of objects, allowing a larger variety of puzzles to be constructed. It is a clone of the original, shareware, Kye for Windows, and is compatible with the large number of existing extra levels designed for the Windows version of Kye. You can make your own levels, and a level editor is included.